Apparatus for determining the data for the laying of guns indirectly



May 19, 1925. 1,538,825

A. KOOIMAN APPARATUS FOR DETERMINING THE DATA FOR THE LAYING OF GUNS INDIRECTLY Filed April 23, 1924, 2 sheets-sheet i May 19, 1925. A 1,535,825-

A. KQOIMAN APPARATUS FOR DETERMINING THE DATA FOR THE LAYING 0F GUNS INDIRECTLY Filed April 23, 1924 2 Sheets-Shed! 2 Q mm 1 m i r UI'JT a 5 IO! l v Itwemr' Patented May 19, 1925.

UNITED STATES PATENT OFFICE.

ARI-S KOOIMAN, OF THE HAGUE, NETHERLANDS.

APPARATUS FOR DETERMINING THE DATA FOR THE LAYING OF GUNS INDIRECTLY.

Application filed April 23,

T 0 all whom it may concern Be it known that I. Ants KooIMAN, a subject of the Queen of the Netherlands, residing at The Hague, Province of South Holland, Kingdom of theNetherlands, have invented certain new and useful Improvements in an Apparatus for Determining the Data for the Laying of Guns Indirectly, of which the following is a specification.

The invention relates to an apparatus for determining the data for the laying of guns indirectly. In applying the apparatus according to the invention the advantage is obtained that the apparatus may have very small dimensions, so that it may be used within a small space. This is important in view of the tact that the known devices require a considerable space to be oper ated.

In order that the invention may be clearly understood it will now be described with reference to the accompanying drawings of which Figure 1 shows diagrammatically the method applied. when using the apparatus according to the present invention.

Figure 2 shows an apparatus constructed in accordance with this invention.

In order to calculate the data for indirect laying, it is necessary to have the co ordinates of battery station 2 (Figure l) of the station 8 situated to the left or to the right and each of the guns 4 ascertained accurately by triangulation (Figure 1). Then the bases 2, 3 (b and 8, l (6 can be calculated, and by pointing with a calculated goniometer angle on a triangulated landmark the goniometers in 2 and 3 can be adjusted, so that the lines O-180 coincide.

At the gun a free ring graduated in degrees, or, if the ring is fixed, a free pointer, must be provided so that 0 is read off when the axis of the bore is pointed at the vertical axis of the goniometer at 3.

In the case where this vertical axis is not visible from the gun the axis of the bore is pointed at a triangulated land-mark and the free ring or the free pointer turned so that an angle calculated in advance is read ofl".

In Figure 1 it is seen that to be able to point the gun 4 at the target 5 the angle 8 and the range 4, 5 must be known.

This data can be ascertained with the apparatus constructed according to the present invention. The apparatus consists of 1924. Serial No. 708,539.

two concentric graduated circular rings a and 72, the ring a being movable but can be fixed to the ring 7) in any desired position. .i grac uated circular ring 0 is provided concentric with the rings 11 and Z) and has attached to it in the line 0-180 a ruler cl, the ring (1 being adjustable by means of a worm-gear (not shown). The ruler (Z has a guide way in which can be moved a block provided with a pin by turning the head 7' of a miocrometer screw; the block is pro ride-d with a vernier (not shown) and the ruler (Z with graduations (not shown). The

lower end of the ruler (Z permits of the readin of its position in regard to the ring a and to the ring 7).

To the ring 7), in the line O180 is attached a ruler r This ruler is provided with graduations and has guide ways in which two blocks are adapted to slide, each square being provided with a Vernier and with the pins h and 9 respectively can be fixed in any desired position.

ruler 7', can be turned about the centre m, like the ruler (Z, and is formed to permit the reading of its position in regard to the ring Z) and to the ring 0, just as with ruler d by means of a Vernier.

Another ruler is, provided with graduations and having guide ways in which a block with a Vernier scale and a pin Z can be fixed to ruler 7c in any desired position. By means of a pin a this ruler is connected with the ruler p and also by means of pin Z with the ruler 7', and can turn with them.

Finally, a ruler 7), can be connected with the pins h and n, the distance between the holes receiving pins 7L and n being the same as that between those receiving pins m and Z.

To obtain the required data it is at first necessary to adjust the instrument in accordance with the situation of the station 3, which is done in the following manner. The pin 72 is moved so that the distance m, 1:. corresponds on a chosen scale with the length of the base .71 and the pin Z is moved, so that a, Z is equal to m, h, then the rulers g, p, 70, j, form a parallelogram. The ring a is turned so that the angle between its line Ol80 and the line 0180 of the ring Z) corresponds with the calculated angle 8 (Figure 1), the ruler (Z being used in the reading ofl. The apparatus is now adjusted at 4 for the station 3.

At regular intervals of time, station 3 communicates to 4: the azimuth and the Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,538,825, granted May 19, 1925, upon the application of Aris Kooiinan, of The Hague, Netherlands, for an improvement in Apparatus for Determining the Data for the Laying of Guns Indirectly, errors appear in the printed specification requiring correction as follows: Page 1, after line 28 insert the following paragraph:

The apparatus according to this invention comprises three graduated concentric circular rings, two of said rings being relatively mocable around a common center, whilst the third ring is fired to a main ruler, which is provided with a slidable pin at each side of the ring center, eoctends in the direction of the line (P480 of the ring, forms together with other rulers the sides of a pwalletogram and meets one of the other sides at the ring center, this other side being formed by a rider piootaltg mounted at the center of the rings, all of the rulers of the parallelogram being connected with each other by hinge joints and slide-connections being provided in order to adjust the length of two opposite sides of the parallelogram, one of thes!" Ides being constituted by said main ruler and both rulers being graduated, whilst furthermore a fifth graduated ruler is rotatably mounted on the common center and fired to one of the two movable rings on the line O -JSU (thus not forming a side of the parallelogram) a pin being slidablg mounted on this ruler. The said main ruler may be fired to the intermediate of the three rings and the rotatable ruler fined to the outer ring. same page, line '77, for the word square read bloch'; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office c Signed and sealed this 8th day of December, A, D. 1925.

[SEAL] WM. A. KIN NAN Acting Commissioner of Patents.

Certificatefof Correction.

It is hereby certified that in Letters Patent No. 1,538,825, igranted May 19, 1925,

upon the application of Aris Kooiman, of The Hague, Nethe ands, for an improvement in Apparatus for-Determining the Data for theLaying 6f Guns Indirectly, errors appear in the printed specification requiring correction as follows: Page'l,

after line 28 insert'the following paragraph:.

The apparatus according tothis invention comprises three graduated concentric. circular rings, two of said rings being relatively movable around a common center,

whilst the third ring is fired to a main ruler, which is provided with a slidable pin at each side of the ring center, extends in the direction of the line 0'180 of .the i ring, forms together with other rulers the sides of aparallelogram and meets one of the other sides at the ring center, this other-side being formed by a ruler piootallg I mounted at the center of the rings, all of the rulers of the parallelogram being con nected with each other by hinge joints and slide-connections being provided in orokr to adjust the length of two opposite sides of the parallelogram, one of these sides being constituted by said main ruler and both rulers being graduated, whilst furthermore a fifth graduated ruler is rotatably mounted on the common center and fired to one of the two movable rings on the line 0180, (thus not forming a side of the parallelogram) a pin being slidably mounted on this ruler. The said main ruler may be'fired to the intermediate of the three rings and the rotatable ruler fi'aed' to the outer ring. same page, line 77, for the Word square read block; and that the said Letters Patent should be read with these corrections therein that the Same may conform to the record of the case in the Patent Oflice- Signed and sealed this 8th day of December, A, D. 1925.

[SEAL] WM. A. KINNAN,

Acting Commissioner of Patents. 

